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AALife Diamonds
Solitaire & Fine Gems
Gemological Knowledge

The Master Guide to The 4Cs

Created by the Gemological Institute of America (GIA), the 4Cs—Cut, Color, Clarity, and Carat Weight—form the universal standard for assessing loose diamond quality and value.

01 • The Sparkle Factor

Diamond Cut: Brilliance, Fire & Scintillation

Cut does not simply refer to shape; it measures how effectively a diamond's facets interact with light. An Ideal or Excellent Cut diamond reflects nearly all light entering the stone back to the eye, maximizing rainbow fire and life.

Ideal / Super Ideal Reflects maximum light with perfect symmetry and heart-and-arrows precision. Top 3% of diamonds.
Excellent Outstanding fire and brilliance. Reflects almost all light with extraordinary scintillation.
Very Good Superior brilliance at exceptional value. Very close to Excellent cut with minor light leak.
02 • The Hue Spectrum

Diamond Color: Pure Colorless to Subtle Warmth

The GIA color grading scale ranges from D (completely colorless) to Z (light yellow/brown). Truly colorless diamonds act like pure prisms.

D - F Colorless

Rarest and purest. Zero detectable color even under 10x magnification.

G - J Near Colorless

Best value sweet spot. Face up appears icy white to the naked eye.

K - M Faint Warmth

Subtle champagne warmth that pairs beautifully with yellow or rose gold settings.

03 • Natural Purity

Diamond Clarity: Inclusions & Eye-Clean Perfection

Clarity evaluates natural birthmarks (internal inclusions and surface blemishes) formed during the diamond’s crystallization deep within the Earth or crystal growth chamber.

FL / IF

Flawless / Internally Flawless. Zero internal blemishes under 10x gemological microscope.

VVS1 - VVS2

Very Very Slightly Included. Extremely difficult for master gemologists to see under 10x.

VS1 - VS2

Very Slightly Included. 100% Eye-Clean to the naked eye. The industry benchmark.

SI1 - SI2

Slightly Included. Noticeable under 10x; mostly eye-clean with huge savings.

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